<template>
	<view>
		<view class="goods-item">
		  <!-- 商品左侧图片区域 -->
		  <view class="goods-item-left">
			  <!-- 使用 v-if 指令控制 radio 组件的显示与隐藏 -->
			  <!-- 存储在购物车中的商品，包含 goods_state 属性，表示商品的勾选状态 -->
			  <radio :checked="goods.goods_state" color="#C00000" v-if="showRadio" @click="radioClickHandler"></radio>
			  <image :src="goods.goods_small_logo || defaultPic" class="goods-pic"></image>
		  </view>
		  <!-- 商品右侧信息区域 -->
		  <view class="goods-item-right">
		    <!-- 商品标题 -->
		    <view class="goods-name">{{goods.goods_name}}</view>
		    <view class="goods-info-box">
		      <!-- 商品价格 -->
		      <view class="goods-price">￥{{Number(goods.goods_price).toFixed(2)}}</view>
			  <!-- 商品数量 -->
			  <uni-number-box :min="1" :value="goods.goods_count" v-if="showNum" @change="numChangeHandler"></uni-number-box>
		    </view>
		  </view>
		</view>
	</view>
</template>

<script lang="ts">
	
	export default {
	  // 定义 props 属性，用来接收外界传递到当前组件的数据
	  props: {
	    // 商品的信息对象
	    goods: {
	      type: Object,
	      default: {}
	    },
	    // 是否展示图片左侧的 radio
	    showRadio: {
	      type: Boolean,
	      // 如果外界没有指定 show-radio 属性的值，则默认不展示 radio 组件
	      default: false
	    },
		// 是否战士价格右侧的 NumberBox 组件
		showNum: {
			type:Boolean,
			default:false
		}
	  },
	  data() {
	  	return {
			// 默认的空图片
			defaultPic: 'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png'
		}
	  },
	  methods: {
		  radioClickHandler(val) {
			  // 通过 this.$emit() 触发外界通过 @ 绑定的 num-change 时间
			  this.$emit('radio-change', {
				  goods_id: this.goods.goods_id,
				  goods_state: !this.goods.goods_state
			  })
		  },
		  // NumberBox 组件的 change 事件处理函数
		  numChangeHandler(val) {
			 this.$emit('num-change', {
				 goods_id: this.goods.goods_id,
				 goods_count: +val
			 }) 
		  }
	  }
	  
	  
	}
</script>

<style lang="scss">
.goods-item {
	// 让 goods-item 项占满整个屏幕的宽度
	width: 750rpx;
	// 设置盒模型为 border-box
	box-sizing: border-box;
    display: flex;
    padding: 10px 5px;
    border-bottom: 1px solid #f0f0f0;

    .goods-item-left {
		margin-right: 5px;
		display: flex;
		justify-content: space-between;
		align-items: center;
		
      .goods-pic {
        width: 100px;
        height: 100px;
        display: block;
      }
    }

    .goods-item-right {
      display: flex;
      flex: 1;
      flex-direction: column;
      justify-content: space-between;

      .goods-name {
        font-size: 13px;
      }
	  
	  .goods-info-box {
		  display: flex;
		  align-items: center;
		  justify-content: space-between;
	  }

      .goods-price {
        font-size: 16px;
        color: #c00000;
      }
    }
  }
</style>
